At least 3,400 civilians died last year amid the war in Afghanistan, a slight decrease from the previous year, according to an annual U.N. report released Thursday.

The United Nations Assistance Mission in Afghanistan said there was a decrease of 2.3 percent from the year prior; there were 3,510 civilian deaths in 2016 and 3,428 in 2017.

Nevertheless, the UNAMA report highlights the higher number of casualties caused by suicide bombings and other attacks using improvised explosive devices, or IEDs.